I had 2gb of Ram installed on my computer last Sunday. Got home and PSE wouldn't open after leaving it for a week it still won't open

I have installed uninstalled etc.. with no luck.
I just updated dhs computer to read raws with PSE and now the freaking organizer wont open so I can't down load through PS
Any suggestions cause after the wedding tomorrow I may wind up in Jail, they already know I am coming and I have already warned dh to expect a call lol.
This just really pisses me off.
Any clues as to what it might be?
TIA